Fireworks is a hybrid application with a competent set of tools and operations for the vector objects. One thing that suits for Fireworks is the ability to design for the screen. It could be a website, web application, desktop application, mobile application, ATM machine or anything else.
Designing with vectors and still get the pixel precision defining for it gives the application an edge. To learn more about how the rendering happens for the vector which have been created in Fireworks check out the following Knowledge Base article at adobe .com by Trevor www.adobe.com/go/d6f2172a